# Red cluster status master not discovered exception **URL:** \ **Category:** Elasticsearch\ **Created:** [September 10, 2020, 9:41am UTC](https://discuss.elastic.co/t/red-cluster-status-master-not-discovered-exception/248142 "2020-09-10T09:41:20Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mohitchavda](https://avatars.discourse-cdn.com/v4/letter/m/c0e974/32.png) [@mohitchavda](https://discuss.elastic.co/u/mohitchavda)\ **Post date:** [September 10, 2020, 9:41am UTC](https://discuss.elastic.co/t/red-cluster-status-master-not-discovered-exception/248142/1 "2020-09-10T09:41:20Z")
we have facing issues of red cluster status and out of 3, only 1 node is visible. before that, we have t2.small instance and to resolve the red cluster status, we have upgrade instance type t2.medium still, clusters are in red and upgrading instance type showing in-progress. How I resolve it? and how I get back all 3 working nodes? for now i got message master\_not\_discovered\_exception or sometimes I also get a message cluster\_block\_exception can anyone help here? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [September 10, 2020, 8:08pm UTC](https://discuss.elastic.co/t/red-cluster-status-master-not-discovered-exception/248142/2 "2020-09-10T20:08:20Z")
Which version of Elasticsearch are you using? How are the nodes configured? How did you end up in this state? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 8, 2020, 8:08pm UTC](https://discuss.elastic.co/t/red-cluster-status-master-not-discovered-exception/248142/3 "2020-10-08T20:08:21Z")
Closed on October 8, 2020, 8:08pm UTC This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.